write any equation for me... maths only..
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Answered by
11
Answer:
In △ABC,∠BAD+∠ADB+∠DBA=180∘ by angle sum property of a triangle.
50∘+90∘+∠DBA=180∘
⇒∠DBA=180∘−140∘=40∘
∴∠B=40∘
Answered by
3
Answer:
answer :
Angle B = 40 degree.
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